Pacearrowben,
I have used jbweld with good results.
Roughen both surfaces with sandpaper and clean with solvent such as alcohol or acetone.
Drill a few #10 holes in both surfaces.
Clamp well per jbweld directions.
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01 WINNEBAGO 35U W20.8.1L 5sp allison SW Wa,. Good Sam, SKP. RVM 198 AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. Michelins, TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '21MB GLA FWD on dolly